Unity Timeline Animations on Hololens 2

Hello, Welcome to Microsoft Q&A,

I did a simple test for Unity Timeline Animations, and it works fine on my HoloLens 2 device.

however when I try to deploy the project to the HoloLens I am presented with a white window with an x in the middle

How did you build and deploy the project? Could you please share some screenshots?

I've even used Holographic Remote for Play Mode but it still does not play on deployment

Are you using Holographic Remoting in the Unity Editor? Are there any error messages? Will your project work in the Unity Editor (without Holographic Remoting)? Please share more information about your project.

@Zuocheng Wang - MSFT Hello and thank you for your response!

I apologize for the lack of information. So when I use Holographic Remoting in Unity the story goes as planned and same goes when I run it in the Game view without Holographic Remoting. When I build it these are the settings that I have:

Then I open the .sln build on Visual Studio, set it as 'Release' and 'ARM64', connect it via IP address to the HoloLens, build the solution and then deploy it.

Any error messages I've been presented with in Unity have been dealt with, so the only ones I've been presented with have been through the UnityPlayer.log document in the HoloLens.

At first, the error messages were referring to how there were issues with the Oculus Controllers, even though I haven't used Oculus whatsoever in the project. I've then removed the oculus controller settings from the Input section at the MixedReality Toolkit, then removed all the models that were in the scene and only used a plain cube. Even in that scenario I was still presented with the same result on the HoloLens but this time the error message was referring to the materials not being loaded.

Also, besides the Timeline feature, I have also used Materialization and Dematerialization on a few objects. This is the first time I'm using both of these on a HoloLens project so I am really unsure of what could be causing a problem.

Could the timeline and materialization be too heavy for the HoloLens to function?

Thank you for your time!

From the screenshot, you need to set Architecture in Unity Build Settings to ARM 64-bit. If it doesn't work, please share your Unity version and I'll test further. Regarding the white window with an x in the middle you mentioned, I want to confirm with you whether you are developing a HoloLens holographic application or a flat UWP application?

Also, if you are concerned about performance, you can refer to the suggestions in Understanding Performance for Mixed Reality - Mixed Reality | Microsoft Learn.

@Zuocheng Wang - MSFT Greetings! So even though I did change it to ARM64 it still had an issue. However, my manager had started a new unity project on his computer using the same objects and transferred it to me and now it works... Something must have not been properly installed in Unity for this issue to be caused but I haven't had the chance yet to examine it further. Thank you so very much for taking the time to help with this and thank you for providing this helpful link!